| 1. |
- Ghazal, Faris, et al.
(författare)
-
Cost-effectiveness of screening for atrial fibrillation in a single primary care center at a 3-year follow-up
- 2022
-
Ingår i: Scandinavian Cardiovascular Journal. - Abingdon, Oxfordshire, United Kingdom : Taylor & Francis. - 1401-7431 .- 1651-2006. ; 56:1, s. 35-41
-
Tidskriftsartikel (refereegranskat)abstract
- ObjectivesThe aim of this study was to estimate the cost-effectiveness of intermittent electrocardiogram (ECG) screening for atrial fibrillation (AF) among 70-74-year old individuals in primary care. We also aimed to assess adherence to anticoagulants, severe bleeding, stroke and mortality among screening-detected AF cases at three-year follow-up.MethodsA post hoc analysis based on a cross-sectional screening study for AF among 70-74-year old patients, who were registered at a single primary care center, was followed for three years for mortality. Data about adherence to anticoagulants, incidence of stroke and severe bleeding among screening-detected AF cases, were collected from patients records. Markov model and Monte Carlo simulation were used to assess the cost-effectiveness of the screening program.ResultsThe mortality rate among screening-detected AF cases (n = 16) did not differ compared to the 274 individuals with no AF (hazard ratio 0.86, CI 0.12-6.44). Adherence to anticoagulants was 92%. There was no stroke or severe bleeding. The incremental cost-effectiveness ratio of screening versus no screening was EUR 2389/quality-adjusted life year (QALY) gained. The screening showed a 99% probability of being cost-effective compared to no screening at a willingness-to-pay threshold of EUR 20,000 per QALY.ConclusionScreening for AF among 70-74-year olds in primary care using intermittent ECG appears to be cost-effective at 3-year follow-up with high anticoagulants adherence and no increased mortality.
|
|
| 2. |
- al-Khalili, Faris
(författare)
-
Coronary heart disease in women : diagnostic and prognostic markers
- 2000
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The main part of this thesis investigated a cohort of women younger than 66 years who had recovered from an event of acute coronary syndrome. It assessed the relationship between traditional coronary risk factors, basic clinical parameters, exercise testing results, coronary angiographic findings and recurrent cardiac events during a five-year follow up period. The role of oestrogen on exercise induced myocardial ischemia and exercise capacity in postmenopausal women with coronary artery disease was also assessed. The main findings in the different sub-studies were as follows: Non-significant coronary lesions were present in a high proportion (37%) of younger female patients with a history of acute coronary syndrome despite the high probability of significant coronary artery disease. Low exercise capacity, low rate pressure product, history of acute myocardial infarction, history of diabetes mellitus, high waist-to-hip ratio and low high-density lipoprotein cholesterol were the parameters that best correlated with the presence of angiographically documented coronary artery disease. Poor exercise capacity and inability to reach high rate pressure product were the exercise test parameters that were the strongest predictors of recurrent cardiac events. History of diabetes mellitus was the strongest independent predictor of adverse cardiac prognosis. Other important predictive factors were history of acute myocardial infarction, angiographically documented left ventricular dysfunction, low level of high-density lipoprotein cholesterol and high level of triglycerides. Female patients admitted for acute myocardial infarction but with a normal coronary angiogram or non-significant coronary lesions were examined with intracoronary ultrasound, which revealed diffuse atherosclerosis with predominantly soft, eccentric and poorly calcified plaques. It is reasonable to assume stimulation of a thrombotic mechanism as responsible for evoking the acute coronary event. Administration of oestrogen to postmenopausal women with stable coronary artery disease did not show any improvement in exercise capacity and did not attenuate the expression of myocardial ischemia.
|
|
| 3. |
- Aronsson, Mattias, et al.
(författare)
-
Cost-effectiveness of mass screening for untreated atrial fibrillation using intermittent ECG recording
- 2015
-
Ingår i: Europace. - : Oxford University Press (OUP): Policy B - Oxford Open Option B - CC-BY. - 1099-5129 .- 1532-2092. ; 17:7, s. 1023-1029
-
Tidskriftsartikel (refereegranskat)abstract
- Aims The aim of this study was to estimate the cost-effectiveness of 2 weeks of intermittent screening for asymptomatic atrial fibrillation (AF) in 75/76-year-old individuals. Methods and results The cost-effectiveness analysis of screening in 75-year-old individuals was based on a lifelong decision analytic Markov model. In this model, 1000 hypothetical individuals, who matched the population of the STROKESTOP study, were simulated. The population was analysed for different parameters such as prevalence, AF status, treatment with oral anticoagulation, stroke risk, utility, and costs. In the base-case scenario, screening of 1000 individuals resulted in 263 fewer patient-years with undetected AF. This implies eight fewer strokes, 11 more life-years, and 12 more quality-adjusted life years (QALYs) per 1000 screened individuals. The screening implies an incremental cost of (sic)50 012, resulting in a cost of (sic)4313 per gained QALY and (sic)6583 per avoided stroke. Conclusions With the use of a decision analytic simulation model, it has been shown that screening for asymptomatic AF in 75/76-year-old individuals is cost-effective.
|
|
| 4. |
- Aronsson, Mattias, 1989-, et al.
(författare)
-
Designing an optimal screening program for unknown atrial fibrillation : a cost-effectiveness analysis.
- 2017
-
Ingår i: Europace. - Oxford : Oxford University Press. - 1099-5129 .- 1532-2092. ; 19:10, s. 1650-1656
-
Tidskriftsartikel (refereegranskat)abstract
- Aims: The primary objective of this study was to use computer simulations to suggest an optimal age for initiation of screening for unknown atrial fibrillation and to evaluate if repeated screening will add value.Methods and results: In the absence of relevant clinical studies, this analysis was based on a simulation model. More than two billion different designs of screening programs for unknown atrial fibrillation were simulated and analysed. Data from the published scientific literature and registries were used to construct the model and estimate lifelong effects and costs. Costs and effects generated by 2 147 483 648 different screening designs were calculated and compared. Program designs that implied worse clinical outcome and were less cost-effective compared to other programs were excluded from the analysis. Seven program designs were identified, and considered to be cost effective depending on what the health-care decision makers are ready to pay for gaining a quality-adjusted life-year (QALY). Screening at the age of 75 implied the lowest cost per gained QALY (€4 800/QALY).Conclusion: In conclusion, examining the results of more than two billion simulated screening program designs for unknown atrial fibrillation, seven designs were deemed cost-effective depending on how much we are prepared to pay for gaining QALYs. Our results showed that repeated screening for atrial fibrillation implied additional health benefits to a reasonable cost compared to one-off screening.
|
|
| 5. |
- Gudmundsdottir, Katrin Kemp, et al.
(författare)
-
Stepwise mass screening for atrial fibrillation using N-terminal B-type natriuretic peptide : the STROKESTOP II study
- 2020
-
Ingår i: Europace. - : OXFORD UNIV PRESS. - 1099-5129 .- 1532-2092. ; 22:1, s. 24-32
-
Tidskriftsartikel (refereegranskat)abstract
- Aims: To study the prevalence of unknown atrial fibrillation (AF) in a high-risk, 75/76-year-old, population using N-terminal B-type natriuretic peptide (NT-proBNP) and handheld electrocardiogram (ECG) recordings in a stepwise screening procedure.Methods and results: The STROKESTOP II study is a population-based cohort study in which all 75/76-year-old in the Stockholm region (n = 28 712) were randomized 1:1 to be invited to an AF screening programme or to serve as the control group. Participants without known AF had NT-proBNP analysed and were stratified into low-risk (NT-proBNP <125 ng/L) and high-risk (NT-proBNP >= 125 ng/L) groups. The high-risk group was offered extended ECG-screening, whereas the low-risk group performed only one single-lead ECG recording. In total, 6868 individuals accepted the screening invitation of which 6315 (91.9%) did not have previously known AF. New AF was detected in 2.6% [95% confidence interval (CI) 2.2-3.0] of all participants without previous AF. In the high-risk group (n = 3766/6315, 59.6%), AF was diagnosed in 4.4% (95% CI 3.7-5.1) of the participants. Out of these, 18% had AF on their index-ECG. In the low-risk group, one participant was diagnosed with AF on index-ECG. The screening procedure resulted in an increase in known prevalence from 8.1% to 10.5% among participants. Oral anticoagulant treatment was initiated in 94.5% of the participants with newly diagnosed AF.Conclusion: N-terminal B-type natriuretic peptide-stratified systematic screening for AF identified 4.4% of the high-risk participants with new AF. Oral anticoagulant treatment initiation was well accepted in the group diagnosed with new AF.
|
|
| 6. |
- Hendrikx, Tijn, et al.
(författare)
-
Atrial fibrillation among patients under investigation for suspected obstructive sleep apnea
- 2017
-
Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 12:2
-
Tidskriftsartikel (refereegranskat)abstract
- STUDY OBJECTIVES: Obstructive sleep apnea is common among patients with atrial fibrillation, but the prevalence and risk factors for atrial fibrillation among patients who are being investigated on suspicion of sleep apnea are not well known. The aim of the study was to estimate the prevalence of atrial fibrillation among patients investigated for suspected obstructive sleep apnea and to identify risk factors for atrial fibrillation among them.METHODS: The prevalence of atrial fibrillation was investigated among 201 patients referred for suspected obstructive sleep apnea. Patients without known atrial fibrillation were investigated with a standard 12-lead ECG at hospital and short intermittent handheld ECG recordings at home, during 14 days.RESULTS: Atrial fibrillation occurred in 13 of 201 subjects (6.5%), and in 12 of 61 men aged 60 years and older (20%). The prevalence of atrial fibrillation increased with sleep apnea severity (p = 0.038). All patients with atrial fibrillation were men and all had sleep apnea. Age 60 or older, the occurrence of central sleep apnea and diabetes mellitus were independent risk factors for atrial fibrillation after adjustments for body mass index, gender, sleep apnea and cardiovascular disease.CONCLUSIONS: Atrial fibrillation is common among subjects referred for sleep apnea investigation and the prevalence of atrial fibrillation increases with sleep apnea severity. Independent risk factors for atrial fibrillation among patients investigated for suspected obstructive sleep apnea include the occurrence of coexisting central sleep apnea, age 60 years or older and diabetes mellitus.
|
|
| 7. |
|
|
| 8. |
- Lyth, Johan, 1980-, et al.
(författare)
-
Cost-effectiveness of population screening for atrial fibrillation : the STROKESTOP study
- 2023
-
Ingår i: European Heart Journal. - : Oxford University Press. - 0195-668X .- 1522-9645. ; 3:3, s. 196-204
-
Tidskriftsartikel (refereegranskat)abstract
- Aims Previous studies on the cost-effectiveness of screening for atrial fibrillation (AF) are based on assumptions of long-term clinical effects. The STROKESTOP study, which randomised 27 975 persons aged 75/76 years into a screening invitation group and a control group, has a median follow-up time of 6.9 years. The aim of this study was to estimate the cost-effectiveness of population-based screening for AF using clinical outcomes. Methods and results The analysis is based on a Markov cohort model. The prevalence of AF, the use of oral anticoagulation, clinical event data, and all-cause mortality were taken from the STROKESTOP study. The cost for clinical events, age-specific utilities, utility decrement due to stroke, and stroke death was taken from the literature. Uncertainty in the model was considered in a probabilistic sensitivity analysis. Per 1000 individuals invited to the screening, there were 77 gained life years and 65 gained quality-adjusted life years. The incremental cost was euro1.77 million lower in the screening invitation group. Gained quality-adjusted life years to a lower cost means that the screening strategy was dominant. The result from 10 000 Monte Carlo simulations showed that the AF screening strategy was cost-effective in 99.2% and cost-saving in 92.7% of the simulations. In the base-case scenario, screening of 1000 individuals resulted in 10.6 [95% confidence interval (CI): -22.5 to 1.4] fewer strokes (8.4 ischaemic and 2.2 haemorrhagic strokes), 1.0 (95% CI: -1.9 to 4.1) more cases of systemic embolism, and 2.9 (95% CI: -18.2 to 13.1) fewer bleedings associated with hospitalization. Conclusion Based on the STROKESTOP study, this analysis shows that a broad AF screening strategy in an elderly population is cost-effective. Efforts should be made to increase screening participation.
|
|
| 9. |
- Svennberg, Emma, et al.
(författare)
-
N-terminal pro B-type natriuretic peptide in systematic screening for atrial fibrillation
- 2017
-
Ingår i: Heart. - : BMJ. - 1355-6037 .- 1468-201X. ; 103:16, s. 1271-1277
-
Tidskriftsartikel (refereegranskat)abstract
- Objective Screening for atrial fibrillation (AF) in individuals aged 65 and above is recommended by the European Society of Cardiology. Increased levels of the biomarker N-terminal pro B-type natriuretic peptide (NT-proBNP) has in cohort studies been associated with incident AF. The aim of this study was to assess whether NT-proBNP could be useful for AF detection in systematic screening.Methods The Strokestop study entailed 7173 Swedish residents aged 75/76 that were screened for AF using twice daily intermittent ECG recordings during 2 weeks. In a substudy of 886 participants, the last 815 consecutive participants and 71 individuals with newly detected AF, levels of NT-proBNP were determined.Results Participants with newly detected AF (n=96) had a median NT-proBNP of 330 ng/L (IQR 121; 634). In individuals without AF (n=742), median NT-proBNP was 171 ng/L (IQR 95; 283), p<0.001. The CHA2DS2-VASc parameters did not differ significantly between individuals with newly detected AF and without AF nor between newly detected AF in the NT-proBNP cohort compared with the cohort where NT-proBNP was not assessed. Using an NT-proBNP cut-off of >= 125 ng/L in a non-acute setting yielded a negative predictive value of 92%, meaning that 35% fewer participants would need to be screened when applied to systematic AF screening. Adding weight to NT-proBNP further reduced participants needed to be screened with a preserved sensitivity.Conclusions NT-proBNP was increased in individuals with newly detected AF. Prospective studies could clarify if NT-proBNP can be used to correctly select individuals that benefit most from AF screening.
|
|
| 10. |
- Svennberg, Emma, et al.
(författare)
-
Safe automatic one-lead electrocardiogram analysis in screening for atrial fibrillation
- 2017
-
Ingår i: Europace. - : Oxford University Press (OUP). - 1099-5129 .- 1532-2092. ; 19:9, s. 1449-1453
-
Tidskriftsartikel (refereegranskat)abstract
- Aims Screening for atrial fibrillation (AF) using intermittent electrocardiogram (ECG) recordings can identify individuals at risk of AF-related morbidity in particular stroke. We aimed to validate the performance of an AF screening algorithm compared with manual ECG analysis by specially trained nurses and physicians (gold standard) in 30 s intermittent one-lead ECG recordings. Methods and results The STROKESTOP study is a mass-screening study for AF using intermittent ECG recordings. All individuals in the study without known AF registered a 30-s ECG recording in Lead I two times daily for 2 weeks, and all ECGs were manually interpreted. A computerized algorithm was used to analyse 80 149 ECG recordings in 3209 individuals. The computerized algorithm annotated 87.1% (n = 69 789) of the recordings as sinus rhythm/minor rhythm disturbances. The manual interpretation (gold standard) was that 69 758 ECGs were normal, making the negative predictive value of the algorithm 99.9%. The number of ECGs requiring manual interpretation in order to find one pathological ECG was reduced from 288 to 35. Atrial fibrillation was diagnosed in 84 patients by manual interpretation, in all of whom the algorithm indicated pathology. On an ECG level, 278 ECGs were manually interpreted as AF, and of these the algorithm annotated 272 ECGs as pathological (sensitivity 97.8%). Conclusion Automatic ECG screening using a computerized algorithm safely identifies normal ECGs in Lead I and reduces the need for manual evaluation of individual ECGs with >85% with 100% sensitivity on an individual basis.
|
|
